2000 chevy blazer starting issues

I WOULD TAKE SPARK PLUGS OUT OF MOTOR MAKE SHURE NO WATER IN CYLINDERS IF THERE IS REDO INTAKE MANIFOLD

check coolant sensor and mass air flow sensor

YOU NEED NEW SPARK PLUGS AND WIRES.CLEAN THE FUEL INJECTORS.BUY A BOTTLE OF INJECTOR CLEANER POUR IN FUEL TANK OF GAS ALSO.CHANGE FUEL FILTER THIS LITTLE TUNE UP SHOULD HELP.

it sounds like you have fuel starvation. try cleaning out your carbourator

mite want to ad some lukus oil treatment,,start up watch oil gauge should be ok

Defective cold start injector. May need a tune up. Computer could be bad not allowing proper injector pulse. Air leak. Idle air motor.

If this engine is a VORTEC then you may have a problem with the internal fuel system. Under the top plenum there is a fuel reg and poppet valves that inject fuel into the cylinders. Sometimes the tubes that run fuel from the reg to the valves can leak and cause your problem. This cannot be found with pressure check because this occurrs after the reg. PS fuel mileage will go down. Let me know if this helps.Moe

Hello

I just worked on this problem a couple of days ago. If the motor is a 3.0 liter. The idle control valve is located at the bottom of the throttlebody assembly right below the bore for the throttle butterflies..What usually causes this valve to go bad is the mechanical part of the sensor sticks as it becomes sludged or carboned up. Manufacturer claims that the valve cannot be cleaned and should only be replaced....It's a high dollar repair to replace this sensor as your engine coolant flows through this electrical valve. The valve idles the car fast when cold, as the antifreeze gets hot the valve drops the idle down.....I have successfully cleaned several of these valves and cured the dying problems...
First remove the air filter top cover and the tubes that connect to the throttlebody. In the right throttlebody you will see a port right before the butterfly. Under the throttlebody you have a black plastic sensor with a 2 wire terminal. Remove the 2 phillps screws and pull off the electrical part of the valve. you will feel a magnetic pull while removing. Remove slowly and catch the black sealing oring, and there will be a metal washer also.. The shaft that is exposed is the mechanical control of the valve. Rotate the shaft and it should feel sticky if bad..Using a throttlebody spray cleaner spray into the small square port of the right bore, rotate shaft and spray until stickfree.....Reassemble

Check the fuel delivery, first. It could be fuel pump or an obstruction. The best way is to start the car in park, then run over to the engine compartment and rev up the throttle. Keep idle higher than normal. If it wants to die, rev throttle higher to compensate. If it makes no difference, verify fuel pressure when engine dies. Usually ignition related wont even allow the car to start. Any service engine indication?

same just happend 2 me,was told it was the neutral safety switch -but didnt start in neutral-took 2 shop 400 later it was the ignition switch runs great again hope i helped